"""Layout-only extension point for a future AI layout provider."""

from dataclasses import dataclass
from typing import Protocol


@dataclass(frozen=True)
class PhotoLayout:
    footer_height: int
    font_size: int
    margin: int


class PhotoLayoutProvider(Protocol):
    def layout(self, size: tuple[int, int], caption: dict[str, str]) -> PhotoLayout: ...


class WatermarkLayout:
    def layout(self, size: tuple[int, int], caption: dict[str, str]) -> PhotoLayout:
        width, height = size
        return PhotoLayout(
            footer_height=max(60, round(min(width, height) * 0.06)),
            font_size=max(24, round(min(width, height) * 0.03)),
            margin=max(24, round(width * 0.025)),
        )